Tianjin Yaoyu Chemicals Co., Ltd was established in1993, which is mainly engaged in manufacturing & exporting various chemical raw materials, such as Sodium Tripolyphosphate(STPP), Sodium Formate, Sodium Carbonate,Glacial Acetic Acid, Formic Acid, Oxalic Acid, Phosphoric Acid, Polyaluminium Chloride, Stearic Acid, Pentaerythrite, Sodium Hydroxide, Potassium Hydroxide, Iron Oxide Red/Yellow/Black/Blue/Brown, Chromium Oxide Green, Zinc Oxide, Calcium Chloride, Carbon Black, Sulphur Black, Copper Sulphate, Aluminium Sulphate, Lithopone, Carboxy Cellulose, Polyvinyl Alcohol, Sodium Hyposulfite, Xanthan Gum etc. in China, which are widely used in painting, textile, leather, cleaning, dyeing, food industry, papermaking, pharmaceutical industy, construction industry and so on. In 1999 we have inv..